Timer



' W- F` WAGNERA y TIMER Filed Aug; 1 1921 s shears-sheet 1 @www July s, 1924. v

W. F. WAGNER .TIMER Filed Aug. 4 1921 3 Sheets-Sheet 2 @nvm/Lto@ July 8, 1924.

' v W. F. WAGNER TIMER Filed Aug. 4. 192i 3 Sheets-Sheet, 3

Y ame/:fgt /'Zgyggf Vw www Patented July 8, 1924.

UNITED STATES WILLIAM F. WAGNER, 0F SAN DIEGO',

CALIFORNIA, ASSIGNOR OF THIRTY-FIVE PER CENT TO ARTHUR W. PEARSONS, OF SAN DIEGO, CALIFORNIA.

TIMER.

Application filed August 4, 1921. Serial No. 489,841.

To all whom imag concern:

Be it known that I, WILLIAM F. WAGNER,

a citizen of the UnitedStates, residing atV San Diego, in the county of San Diego and State of California, have invented certain new and usefulv Improvements in Timers; and I do declare the following to be a full,

the line 99 of Fig. 7.

clear, and exact description of the invention, such as will enable others skilled in Athe art to which it appertains to make and use the same. Y Y

This invention relates to an improved timer for usein connection with an internal combustion engine and one object of the invention is to provide an improved type of mova-V ble contact carrier including `a bell crank lever pivotally and slidably'mounted and having onerof `its 'arms provided with an abutment for engagement byv abutments carried by a collar mounted upon a driving shaft, the belll crank lever being rocked upon its pivot when the shaft is rotated in one direction to bring the movableI contact carried by the lever into engagement lwith a stationary contact and the llever having 4sliding movement when the shaft rotates in a reverse direction thus preventing the movable contact from engaging the stationary contact.

Another object of lthe invention is to l provide an improved type of spring carrier strip forfone of the contact points, the strip permitting the contacts to move into tight engagement and the 'stripY bending after contacting thus permitting close contact but at the same time l preventing danger of breakage. l

" Another` object Vof the invention is to provide a tim'erin which the movable contacts may have sliding engagement with the stationary contactsthus providing a wiping action which will serve to keep the contacting faces of the contact points clean and well polished.

`Another object of the invention isto providea timer which will be simple in construction,v efficient in operation and not lia-ble Vto readily get out of order.

` ThisV invention is illustrated in the accompanyingV drawings, wherein:

Figure' 1 is a view showing the improved timer in verticalk section.

' Figure 2- is a top plan view of the timer base with the contactsput of engagement.VK

Figure 3 is a similar view showing the contacts in engagement.

Figures 4, 5 and 6 are sections taken along the lines 1 -1, 5-5 and 6-6 respectively oflig. 2.

Figures 7 and 8 are views similar to Figs. 4f and 5 taken through a timer having a slightly modified construction.

Figure 9 is a sectional view taken along l Figure 10 is a view similar to Fig. 6 taken along the line 10-10 of Fig. 7.

The timer is provided'with a base 1vhavving a depending neck 2 in which is rotatably mounted a shaft 3 adapted for connection with a shaftvi which will be rotated from Vthe drive shaft of an internal combustion motor. It will thus be seen that the shaft Y3 will be rotated in timed relation to the rotation of the crank shaft of the motor. A collar 5 is secured upon the inner end .portion of the shaft 3 by means of a securing bolt 6 which has its head extended for fitting into a recess formed in a head or crown 7 which fits upon the upper end portion of the collar 5. This head or crown 7 carries a distributor arm 8 one end of which engages a terminal 9 for a conductor 10 leading from a coil. The second end portion of this distributor arm is adapted to engage the terminals 11 of the conductors 12 which lead `to the plugs and it will thus be'seen that the plugs will be energized in proper order. The cover 13 which carries the'terminalsQ and 11 fits upon the base and is releasably held in place by the catches 14 carried by the base as shown in Fig. 1.V

A lever 15 which is substantially L-shaped and therefore resembles a bell-crank lever rests upon the base 1 and is slidably and pivotally held in place by a screw 16 which passes through a slot 17 formed in the lever 15. Thislever has its arms provided with upstanding end portions or heads 1S and V19 and the 'head 18 carries anY abutment block 20 which extends towardV the collar 5 so that as the shaft Y3 rotates, the abutment lugs 21 of the collar 5 will engage this block and impart movement to the lever. It should be noted that the block is cut to provide a shoulder 22 and that the teeth 21Y are so cut that when vthe shaft 3 is rotating in the direction indicated by the arrow, the teeth or lugs 21 will engage block 20 and rocklthe lever upon its pivot 16 whereas if the shaft should rotate in an opposite direction as would occur when a motor back-fires,

the lugs or teeth 21 would engage the abutment and the lever would slide instead of swinging. Vfhen the lever swings upon its pivot, contacts will be brought into engagement as will be hereinafter brought out but when the engine tries to back-lire and the shaft is rotated in the reverse direction, the lever will slide instead of swinging upon its pivot and no contact will be formed and therefore continued rotation of the shaft 3 due to back-firing of the motor will-be prevented. rlhe head 19 is positioned substantially parallel to the head 18 and is posi-- tioned upon the opposite side of the collar andshaft from the head 18. It will thus be seen that when the lever 15 rocks upon its pivot, the head 19 will swinO relatively toward the shaft 3 and will to a certainiextent have movement radially of the shaft. A rigid strip 23 extends parallel to the head 19 and carries af pin 24'which1extends through an enlarged opening formed in a resilient strip 25, one end portion of which is bent to engage the inner face of the rigid strip 23. Registering opening-s are'formed in these strips to receive insulating sleeves 26, which in addition to passing throughthe strips 2 3 and 25 also pass through openings formed in an insulating strip 27 positioned. between the strip 25 and the head 19. lt will thus be seen that when the screws 28 are tightened, the strips 23 and 25 will be securely held in place and will be insulated from the lever 15. Apin 29 extends out-- wardly from the rigid strip 23 and is Vengaged by a spring 30 so that the lever will be yieldably held in a normal position as shown in Fig. 2 with the contact points 31 of this movable contact element out of engagement with contact screwsy 32 which pass throughV the threadedV openings formed in the shoulder 33 of the bracket 3a. This shoulder is split as shown in Fig. d and a securing screw 35 is provided so that the portions of the shoulder may be drawn Vinto binding engagement withV the contact screws32 and secure the screws in a set position. It is desired to limit movement of the relatively movable contact awayY from the stationary contact and therefore there has been provided at post 36 which iseccentrically mounted by means of a pin 37 and provided with a disk-like -base 38; rlibe-post is rotatable upon the stem 37 andthe base is provided withV a slot 39 through which passes a screw 40. By rotating the post, the amount of movement permit-ted when the Vmovable contact is moving away from a stationary contact canv be controlled. It will thus be seen'that when the contacts are sepae rated as shown in Fig. 2, passage of current from the wire t1 through the conductor Zi2 to the strip 23. and from the stripV 23'to the bracket 34 and bacl; Vto the wire 4:3 41vill be interrupted, whereas when the contacts 31 be permitted. It will be further noted that when the block 2O is engaged by one of the lugs 21 and swung upon its pivot, the contact points 31 will first engage the ends of the screws or contacts 32 and will then slide across the end of these screws thus providing a rubbing contact which will clean the contacting faces of the screws and contact points 31. If the motor should back-fire, contact will be prevented and continued back-firing will not occur due to the fact that instead of swinging upon its pivot, the lever will be moved longitudinally of the slot 17 and the contacts will not be brought into engagement. As previously stated, the provisions of the resilient strip 25 permits the contacts to come in closeV engagement thus preventing breaking and also preventing eXtra wear uponthe contactrpoints31 and end of the screw 32.

In the preferred form, the strip 2,5;is provided with a plurality of'contact points 31 and a plurality of contact screws 32 are carried by the bracket 3e. By providing a plurality of contacts 31 and 32 a goed contact is assured and further rapid; consumption of the contact points is prevented. If, however, it is desired to provide a'cheaper distributor, a single contact31` and a single screw 32 may be provided as shownV in Eigs. 7 throughlO. Y Y 'Y 1. A timber comprising a base, a rotatable shaft extending through the base, a stationary contact carried by the base, a lever pivotally carried by the base andy having arms, extendingin diverging relationV from the point of mounting, a rigid strip carried by one arm of the lever and having movement toward' and away from the stationary contact when the lever Vmoves pivot-ally, a resilient strip carried by one end .off said rigidstrip and havingnitsfree end provided with a longitudinally extending cutout, a pin carried by said rigid strip and extendiing `through the cutout andhaving a head engagingA the resilient strip to limit lmoveinentthereof away from Vthe, rigid strip, a contact point carried bythe free end portion of said resilient strip vfor engaging the sta.- tionary contact when said lever is moved to swing said rigid strip towards said staary contact carried by the base, a lever pivotally and slidably mounted upon the base at a point diametrically opposite the rotatable shaft romthe stationary contact and having diverging arms, one arm extending toward the stationary contact and carrying an abutment element extending toward the shaft, a Contact carried by the second arm of the lever and extending parallel to the first arm upon the opposite side of said shaft, resilient means yieldably holding the lever against movement, and means carried by said shaft for engaging the abutment element of the lever as the shaft rotates, rotation of the shaft in one direction imparting swinging movement to the lever to bring the movable Y contactinto rubbing contact with the stationary contact and reverse rotation of the shaft imparting sliding movement to the lever With the contacts out of engagement.V

my hand.

WILLIAM F. WAGNER. 

